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Ziehl-Abegg RH71C Alternative — LONGWELL LWBE3G630

Looking for an alternative for Ziehl-Abegg RH71C-6DK? The LONGWELL LWBE3G630 is the nearest listed size (Ø630 mm); LONGWELL does not list a Ø710 mm model in this family. Catalogue ratings, measured curves and dimensioned drawings are on the LONGWELL Fan Selector; final selection is made at your duty point. Typical applications: very large CRAH, industrial process exhaust, stadium HVAC.

Reference model: Ziehl-Abegg RH71C-6DK Diameter: Ø710 mm Family: RH series → LONGWELL LWBE3G / LWAE3G / LWFC Sample: 1–3 days
Reference model
Ziehl-Abegg
RH71C
RH series · EC backward-curved centrifugal plug fan · Ø710 mm
→
LONGWELL series
LONGWELL
LWBE3G630
Nearest listed size · dimensions per LONGWELL drawing · 15–30 day production lead time

Specification Comparison

Specification Ziehl-Abegg RH71C LONGWELL LWBE3G630
Fan type EC backward-curved centrifugal plug fan EC backward-curved centrifugal plug fan
Impeller diameter Ø710 mm No listed Ø710 mm model — nearest listed size Ø630 mm (LWBE3G630, 7 models)
Airflow range 2,200–16,000 m³/h up to 21,742 m³/h per Ø630 unit — larger duties as FanGrid arrays
Static pressure (max) 1700 Pa up to 1,677 Pa (Ø630 unit)
Motor power (max) 7,500 W up to 5,600 W per unit
Noise floor (Lw) 43 dB(A) from 66 dB(A) (nameplate, per model)
Voltage 380–480 V 3Φ 380–400 V 3Φ
Control input 0–10 V / PWM / Modbus / EC-Control 0–10 V / PWM / Modbus RTU (RS485)
IP rating IP54 / IP55 IP54 (per model)
Certifications CE · UL · VDE · EAC CE · RoHS
Sample lead time Per manufacturer quotation 1–3 days
Series lead time (≤500 units) Per manufacturer quotation 15–30 days
Pricing Per manufacturer quotation Quoted per project
Verify it on the LONGWELL selector: all 7 LWBE3G630 models — data, measured curves, drawings · LWBE3G630-188NT-09 (largest airflow in the series) · check your own duty point · samples, MOQ and lead time

LWBE3G630 at a glance

Production Lead Time

15–30 days
Ex works for production batches. Stock standard models ship as samples in 1–3 days.

Pricing

Quoted per project
Price depends on model, voltage, control option and quantity. Sample fees are credited in full against the first production order.

Nearest size + FanGrid option

Ø630 mm
nearest listed size with the same 0–10 V / PWM / Modbus RTU control; mounting per the LONGWELL drawing (not a drop-in for Ø710 mm).

Installation and control: what to check

Mechanical

LONGWELL does not currently list a Ø710 mm unit in this family. The nearest listed size is Ø630 mm (LWBE3G630); for the airflow of a single Ø710 mm fan, engineering proposes 2–4 smaller EC units in a FanGrid array or a custom development — mounting is not a drop-in.

Electrical & control

The LONGWELL LWBE3G630 accepts a 0–10 V analog speed reference, PWM and Modbus RTU (RS485) control signals (per model; see the model datasheet). LONGWELL supplies its Modbus RTU register map with the fan so the BMS points can be re-mapped; the register addresses are not identical to the Ziehl-Abegg map.For other bus protocols, ask LONGWELL engineering for the integration options.

Performance

The measured P-Q curve of every LONGWELL model is on its model page; we check your duty point against it before quoting.

Typical Applications

The LWBE3G630 is typically specified for very large CRAH, industrial process exhaust, stadium HVAC. Common application categories include:

  • Large CRAH
  • Process exhaust
  • Large RTU

Particularly suited for very large CRAH and industrial process exhaust applications.

FAQ

What should I check before using LONGWELL LWBE3G630 in place of Ziehl-Abegg RH71C?
Not as a drop-in: LONGWELL does not list a Ø710 mm model in this family. The nearest listed size is Ø630 mm (LWBE3G630); for equal airflow we propose a FanGrid array of smaller EC units or a custom development. Ask engineering with your duty point.
Where can I find efficiency data for LWBE3G630?
LONGWELL does not publish a single peak-efficiency figure for the LWBE3G630. The model page on the selection site gives airflow, static pressure and input power along the curve (measured where marked, nameplate-estimated otherwise), so the efficiency at your duty point follows directly; a test report for a specific model is available from engineering on request.
What is the LONGWELL lead time?
LONGWELL LWBE3G630 ships in 15–30 days for orders up to 500 units and 6–10 weeks for 1,000+ unit OEM programs. Sample units ship in 1–3 days from stocked Ø710 mm inventory.
How is LONGWELL pricing determined?
LONGWELL quotes per project. Pricing depends on quantity, voltage, IP rating, and control protocol options.
What applications is LWBE3G630 typically used for?
LWBE3G630 is typically specified for very large CRAH, industrial process exhaust, stadium HVAC. Particularly suited for very large CRAH and industrial process exhaust applications.

Evaluate a LONGWELL alternative to RH71C — samples in 1–3 days

Send a quick request — model + quantity + delivery address. Sample unit ships in 1–3 days for field validation. Series production at 15–30 day lead time after PO.

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Official Product Page
Browse the full Backward-Curved Centrifugal EC Fans range on longwellfans.com — request a quote on LWBE3G630 directly.
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LONGWELL is an independent manufacturer and is not affiliated with, endorsed by, or sponsored by Ziehl-Abegg GmbH. Ziehl-Abegg® is a registered trademark of Ziehl-Abegg GmbH. All specifications are based on publicly available datasheets as of May 2026 and are provided for engineering reference only. All performance figures reflect specific test conditions; final selection should be confirmed by duty point, voltage/control, mounting and project validation.